Holiday Open House.: Drop by to enjoy a day by the bay during your holiday break, Dec. 26-Dec. 28. Crab Cove, 1252 McKay Ave., Alameda. From 10:30 a.m.-12:30 p.m., learn about water and ocean creatures on our big screen (popcorn and cider will be served); 1-2 p.m., "Bird Bingo," go bird watching to see if you can get bingo and a prize; 2-3 p.m. "Catch of the Day" beach exploration to look for evidence of sea creatures and see what the storms brought in; 3-3:30 p.m., watch the excitement of fish feeding time in our aquarium. No registration required. For information, call 510-544-3187. Events included in admission. www.ebparks.org.